Implement eth_accounts

[austinabell]

• Implements Implement eth_accounts #25 Using keys set up with Ethermint keybase

To run:

make install 
rm -rf ~/.emint*
emintd init moniker --chain-id 3
emintcli config chain-id 3
emintcli config output json
emintcli config indent true
emintcli config trust-node true
emintcli emintkeys add austineth
testpass
testpass
# Add any other keys here
emintcli rest-server --laddr "tcp://localhost:8545"

Test:

curl -X POST --data '{"jsonrpc":"2.0","method":"eth_accounts","params":[],"id":1}' -H "Content-Type: application/json" http://localhost:8545/rpc
# With Accounts: {"jsonrpc":"2.0","id":1,"result":["0x030332fd5114667ca29b9a73e005333d8fd013cb","0x3442b1b15c5987cd4ed1c08e2ba3dd40d3542b9f"]}
# Without accounts: {"jsonrpc":"2.0","id":1,"result":[]}